Supermassive Games’ upcoming interactive horror game Until Dawn, is all about providing the player with choices but the results can be disastrous. The newly released ‘Aftermath’ trailer focuses on the Butterfly Effect mechanic and how it alters the game’s story.

“The way we have implemented this system in game means there are thousands of potential branches to every player’s individual story. Some of your decisions might appear to be inconsequential – a conversation choice that makes a character come across as a bit of an ass, for example – but if you’d made a different choice that character might have ended up the hero. Everything you choose can affect how other characters react, potentially with dire consequences. Some choices are more obvious but much more difficult, like choosing which friend will live and which will die,” Tim Hodges Product Manager, SCEE

Every decision you make can have an immediate or long-term impact on the story. According to Hodges you won’t always know what they will be, until after you’ve made your choice. “It was important to us that players shouldn’t second guess their path through the story of Until Dawn. It’s only after you’ve made a decision that you’ll find out the consequences of that choice, sometimes only hours later.”

Until Dawn will launch of August 25, exclusively for the PlayStation 4.